Simulation of Phase Equilibria in High Chromium White Cast Irons
In this study, using the Materials Calculator software program, the pseudo binary phase diagrams (i.e. isoplethal maps) of high chromium white cast irons (~19% in weight) with different molybdenum contents were simulated. In order to test the accuracy of the calculated phase diagrams, the transforma...
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| Format: | Article |
| Language: | English |
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Bursa Uludag University
2018-12-01
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| Series: | Uludağ University Journal of The Faculty of Engineering |
| Subjects: | |
| Online Access: | https://dergipark.org.tr/tr/pub/uumfd/issue/39804/333701 |
| _version_ | 1797916049356619776 |
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| author | Hakan Yıldırım Duygu Candemi̇r Öncü Akyıldız |
| author_facet | Hakan Yıldırım Duygu Candemi̇r Öncü Akyıldız |
| author_sort | Hakan Yıldırım |
| collection | DOAJ |
| description | In this study, using the Materials Calculator software program, the
pseudo binary phase diagrams (i.e. isoplethal maps) of high chromium white cast
irons (~19% in weight) with different molybdenum contents were simulated. In
order to test the accuracy of the calculated phase diagrams, the transformation
temperatures read from the diagrams at certain compositions were compared with
the phase transformation temperatures measured using Differential Scanning
Calorimetry (DSC) analysis of the samples produced by casting in the same
composition followed by slow cooling. With the same purpose, low temperature
phases read from the phase diagrams were compared with the crystalline phases
determined by X-Ray Diffraction (XRD) of the casted samples. Simulated diagrams
predicted an increase in the amount of secondary M23C6carbides with increasing molybdenum content. The
validity of this prediction was tested by determining the phase distribution
and phase compositions in the casted samples by means of metallographic
examinations and Scanning Electron Microscopy (SEM) - Energy Dispersive
Spectroscopy (EDS) analyzes. When the hardness values of the samples were taken
into consideration, it was seen that the hardness increased from 44.90 to 51.05
HRC with a 1% increase in Mo content and a corresponding increase in the amount
of secondary carbides without any heat treatments. Results show that
theoretical predictions and experimental measurements are in accord and
estimating phase equilibria in multi-component systems is of practical
importance. |
| first_indexed | 2024-04-10T12:51:03Z |
| format | Article |
| id | doaj.art-da3b08a693dc4eaaa77d3a447f97d9e2 |
| institution | Directory Open Access Journal |
| issn | 2148-4147 2148-4155 |
| language | English |
| last_indexed | 2024-04-10T12:51:03Z |
| publishDate | 2018-12-01 |
| publisher | Bursa Uludag University |
| record_format | Article |
| series | Uludağ University Journal of The Faculty of Engineering |
| spelling | doaj.art-da3b08a693dc4eaaa77d3a447f97d9e22023-02-15T16:13:49ZengBursa Uludag UniversityUludağ University Journal of The Faculty of Engineering2148-41472148-41552018-12-0123317919010.17482/uumfd.3337011779Simulation of Phase Equilibria in High Chromium White Cast IronsHakan Yıldırım0Duygu Candemi̇r1Öncü Akyıldız2Duduoğlu Steel Casting Industry and Trade Inc. Co., 19040, Corum, TurkeyDepartment of Metallurgical and Materials Engineering, Hitit University, 19030, Corum, TURKEYDepartment of Metallurgical and Materials Engineering, Hitit University, 19030, Corum, TURKEYIn this study, using the Materials Calculator software program, the pseudo binary phase diagrams (i.e. isoplethal maps) of high chromium white cast irons (~19% in weight) with different molybdenum contents were simulated. In order to test the accuracy of the calculated phase diagrams, the transformation temperatures read from the diagrams at certain compositions were compared with the phase transformation temperatures measured using Differential Scanning Calorimetry (DSC) analysis of the samples produced by casting in the same composition followed by slow cooling. With the same purpose, low temperature phases read from the phase diagrams were compared with the crystalline phases determined by X-Ray Diffraction (XRD) of the casted samples. Simulated diagrams predicted an increase in the amount of secondary M23C6carbides with increasing molybdenum content. The validity of this prediction was tested by determining the phase distribution and phase compositions in the casted samples by means of metallographic examinations and Scanning Electron Microscopy (SEM) - Energy Dispersive Spectroscopy (EDS) analyzes. When the hardness values of the samples were taken into consideration, it was seen that the hardness increased from 44.90 to 51.05 HRC with a 1% increase in Mo content and a corresponding increase in the amount of secondary carbides without any heat treatments. Results show that theoretical predictions and experimental measurements are in accord and estimating phase equilibria in multi-component systems is of practical importance.https://dergipark.org.tr/tr/pub/uumfd/issue/39804/333701matcalccomputational thermodynamicsalloy designhigh chromium white cast ironsecondary carbideshesaplamalı termodinamikmatcalcalaşım tasarımıyüksek kromlu beyaz dökme demirikincil karbürler |
| spellingShingle | Hakan Yıldırım Duygu Candemi̇r Öncü Akyıldız Simulation of Phase Equilibria in High Chromium White Cast Irons Uludağ University Journal of The Faculty of Engineering matcalc computational thermodynamics alloy design high chromium white cast iron secondary carbides hesaplamalı termodinamik matcalc alaşım tasarımı yüksek kromlu beyaz dökme demir ikincil karbürler |
| title | Simulation of Phase Equilibria in High Chromium White Cast Irons |
| title_full | Simulation of Phase Equilibria in High Chromium White Cast Irons |
| title_fullStr | Simulation of Phase Equilibria in High Chromium White Cast Irons |
| title_full_unstemmed | Simulation of Phase Equilibria in High Chromium White Cast Irons |
| title_short | Simulation of Phase Equilibria in High Chromium White Cast Irons |
| title_sort | simulation of phase equilibria in high chromium white cast irons |
| topic | matcalc computational thermodynamics alloy design high chromium white cast iron secondary carbides hesaplamalı termodinamik matcalc alaşım tasarımı yüksek kromlu beyaz dökme demir ikincil karbürler |
| url | https://dergipark.org.tr/tr/pub/uumfd/issue/39804/333701 |
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